Wm Rogers Sterling Silver Is A Wm Rogers 971G Silver 12" In Diameter Tray Worth Any Money? How Do I Find Out? I Think This Is Roger Bros

Is a Wm Rogers 971G silver 12" in diameter tray worth any money? How do I find out? I think this is Roger Bros - wm rogers sterling silver

I think it's a silver platter by Roger Brothers. At the bottom of the tank that is included with the following information: WmRogers971G (if applicable).

Thank you for your help.